SY21275DBC - High Performance Boost Regulator for UHD TV Display


  • Wide Input Voltage Range: 8.6V ~ 15.9V
  • 95% Typical Efficiency
  • Feedback Reference Voltage : 1.25V +/-1.5%
  • 500kHz Fixed Switching Frequency
  • Pulse Skipping Mode at Light Load
  • Adjustable Soft-start Time
  • EN ON/OFF Control
  • Over Voltage Protection
  • Cycle-by-cycle Current Limiting Protection
  • Input UVLO
  • Thermal Shutdown with Auto Recovery
  • RoHS Compliant and Halogen Free
  • Compact Package: DFN3x3-10

Typical Application


SY21275 is a high efficiency, current-mode control Boost regulator. The device integrates a low RDS(ON) N-channel MOSFET for high efficiency. The fixed 500kHz switching frequency achieves high efficiency and fast transient response. The external programmable soft start time minimizes the inrush current at start-up.

SY21275 is available in compact DFN3×3-10 package.


  • TFT LCD Panels AVDD